Front arch for narrow locomotive-furnaces.



G. B. MOORE. mom mun ron HARBGW LOGOMOTIVE FURNACES.

APPLICATION FILED HAY B0, 1907.

Patented Nov. 17, 1908.

2 BHEETS-SHEET 1.

U. B. MOORE. FRONT ABOH FOR N-ARROW LOOOMQ'I'IVE FURNACES.

APPLICATION FILED MAY 20, 1907.

Patented Nov. 17, 1908.

2 SHEETS-8HEET 2.

- UNITED s'rArns PA CHARLES ll. MOORE, OF EVANSTON ILLINOIS.

FRONT ARCH FOR NARROW LOOOMOTIVE-F'lIENACES.

Specification of Letters Patent.

Patented Nov. 1?. 190a.

Appllliltlon flied lay so, 1907. man No. 314,12

ouablc others skilled in the artnto which it a'pu-rtaius to make and use the samc.

s of ditl'orrnt construction t Hill 7 'wule forum-cs. This is due to two reasons,

1y lnr'cution relates-to improvements in locomotirc boiler furnaccs and has special refereucc toimprovemonts in the construc tion and arrangements of the front arches in such furnaco More )articularly, this invention a lumlitiratlon of that which is shown and .l\-- scribod by me in a'conipauiou application of even date hcrcuith. Scrial No. 374.721. in which l have disclosed a hwomotircboilcr .fulnacc haring'thc usual arch tubcs and oquippcd with a refractory front arch co1nprising a central or btulyportion compost-d of scvcral rows: of bricks resting upon the arch 'tubrs and tllittblltlf the line shret,'aud t dgo or marginal briclis of greater \vidtl than thc spa -cs between the body portion and'tho'side sheets. filling said spaccs.

'Ihc object of this invention is to pro\'itlo a. front arch for loromotivc boilcr furuacrs having the general clmractcristics of the our 1 above iiwntioncd, but which will hr of suchltlOtllilOtl construction asto be particularly adaptcd to furnaces of the narrow tire box type. Furnaces of this tr e ret uire an arch tlmso usvd in namcly: the irregularity of the side shoots of thc t'nrl'mcc. whichrequiret-i'au arch of varying width; and thoimpracticability of taking tho air in through the front of the furuaoo. as to drop tho front rod of tho arch low ru'ougrh ftll"l'-lllt-l"DUIPOM' would place it, toont-ar tho gziatc: which not-ossitatos taking the alrlu through tluasidi s ol' the furuacr;

'lho partirulaaohjut of this anrontiou is l to; so improvo tlui forth and construction of tho front arches for :Lttarrow lotauuotiro' boilcr furntu'cs that brlqks'oftlotlnltr sha'ptand sizes'shall to adajvtcd for aw in all boilers of this t y )1.

I A-furthcr olucct is to provido. a frontarch. for narrow lm'onmtit'o boilcr furuact ii formod of bricks of \lt'lllllto size and sllttpr,

.\ still further ob jwl of this invention-- is to provide a front arch for narrow locotltOllVt boiler furnaccs of such improved t-mistructiou that parts thereof may be rvadily rcnun cd to alt'ord access to the stay bolts, which anin front of or above the arch. for tho purpose of inspection and r pau'.

Furt'hcr objects of the invention appear liurci naftcl'.

My invention consists, nerally in a locomotive boiler furnace aving the usual arch tubes, in combination with a refractory arch. com )rising a. bottom cud brick abutting the i no sheet and of substantially the width of thc'furnace, a central row of bricks of substantially the same width as the group of archtubcs and resting thereon, and side or nmr inal bricks filling the spaces betwern tl the curved Sid c shccts.

My inventimi further consists in a locomotive boiler furnace having the usual arch tubes, in combination with a refractory arch comprising a bottom end brick of substanti-ally the-width of the furnace and abutting the end of the flue sheet, at body portion formed of other bricks and of'substantiully thc width of the roup of arch tubes and resting thereon, si e bricks .of master width than the spaces between the b0 portion, of the arch and the side sheets, and clossaid spaces; longitudinal air ducts in said bod portion bricks and a transverse air. duct n the lowermost, brick of said body portion, said transverse air duct comuuum.

eating with tho outer air through the sides of the furnace.

Furthcr. my invention-consists in a locomotive boilcr furnace having the usual I 'rch tubes and provided with air intake tubes it its sides. in combination with a front arch comprising a bottom cud brick abutting the flue shoot and rcaching substantially across the furnace, at single longitudinal. row of bricks of substantially tho same width as the group of arch tubrs and ha ring holes-which regis- ;tct' tot'orm longitudinal air ducts, the lower brick of said row havin' a transverse air t duct cr'wmiitnitatting'wit the longitudinal ducts. two small bricks Iitlcd between the ends of said lower brick and the sale shoots and having air ducts which connect the duct in the lower central brick with said intake tubes, and marginal bricks of greater width than the s aces between the central row of bricks an the side sheets and resting thereon.

Further, my invention consists in a locomotive'boiler furnace containing arch tubes, in combination with an arch comprising a central longitudinal row of bricks resting upon the arch tubes, and side bricks sup ported upon the edges of said central row of bricks and leaning against the side sheets, the arch tubes being arranged beneath the joints between said central row of bricks and the side bricks. And further, my invention consists in various novel details of construction and in combinations of parts, all as hereinafter described and particularly pointed out in the claims.

Myinvention will be more readily understood by reference to the accompanying drawings, forming a part of this specification and in which;

Fi 'ure 1. is a lon itudinal vertical section of itiUCOlllOllVE boi er furnace of a narrow fire box type, equipped with a front arch embodying my invention; Fig. 2 is a horizontal section on substantially the line 2-2 of Fig. l, the lower right hand corner of the arch being broken away to disclose the air ducts; Fig. 3 is a cross section on the line 3-3 of Fig. 1; Fig. 4 is a cross section' on the line H of l i 1; and Fi .5 is a similar section on the line 5-5 of ig. 1.

Referring to the drawings, A indicates the flue sheet, B the side sheets, and C the rear sheet of a locomotive boiler furnace of which D is the crown sheet and E the arch tubes. The arch tubes extend longitudinally through the furnace and support ,the refractory arch, F.

The arch F is arranged slantingly within thc* furnace, .and preferably comprises a front or base portion containin cinder holes and of practically the width 0 the furnace; a central or body portion of less width than the furnace and formed of a number of bricks resting upon the base portion; and, side or marginal bricks closing the )accs between said body portion and the si 0 sheets. 'lhefrontior base ortion is ii'idicated in the drawin at f. T is is preferably a singlq brick o substantially the width of the fire box and is rovided with legs or extensions, f, $vhich aliut or {est a ainst the line sheet, A, formin cinder disc arge openings. As the brick touches the flue sheet only at the two points when the legs, f, rest against it, uniformit of tine sheet temperature is insured. The body porti n of the arch comrisesa bottom bricl intermediate ricks, and, a top eflector brick, f. The brick f is provid d with a transverse air duct, f, extcndin from end to end thereof, and two short ducts, f, connecting said transverse duct with ducts 7" formed in the bricks f, and which extend longitudinally through the arch to the top or dcllecting brick, f.

U indicates the air intakes, which are tubes extendingthrough the sides of the furnace, opposite the ends of the transverse duct, As before stated, in boiler furnaces of the type under consideration, it is impracticable to drop the front end of the arch low enough to have the air intake through the front of the ford-mo, hence the necessity of admitting the air through the sides thereof. Between the ends of the bottom brick, f, and the side sheets of the furnace are small bricks, 1', having air ducts, 7", connecting the duct f with the air intakes, (l. The ends of the brick are upwardly and inwardly inclined, forming wedge shaped spaces be tween them and the line sheet, ll, and the bricks f are corrcspomlingly formed, to lit the wedge shaped spares. As furnaces of substantially the sumssize or type are scldom the same width between the side sheets. and, as the bricks f are of uniform size, the spaces between the ends of said bricks and the ide slums will vary in ditlerent furlliH'lfH. 7', will always fit snugly in place and hold the central portion of the arch with sufficient firmness to prevent vibration. vAlthough the bricks f will tit in place, no matter what the space may be, the ends of the ducts f therein will not always exactly register with the duct and the intakes (1 Accordingly the ends of the duct i and the outer ends of the ducts f are flared, in order to form an unobstructed passage for the air, whatever the vertical positions of the bricks may be.

The intermediate bricks, fiend the rear deflector bricks, f, are of the same shape in cross section as the brick f; hence the body portion of the arch is of uniform cross section throughout, and has upwardly and in wardly irl'clined edges, 1*", throughout its length. To close the space between the edges of the body portion of the arch and the flue sheets, I provide the side or marginal bricks, w, which are supported by the edges of. the body portion of the arch and rest against the side sheets, 15. These bricks are of irregular shape, the space they are designed to fill is irregular, the arch being positioned aslant between the flaring side sheets. Hence I form these bricks of substantially the size and shape of the spaces wit i projections, w, to rest against the side sheet. These 'n'ojcctions may be easily chipped oil to fit the bricks in place. The inner edges of the bricks, or, are doubly beveled, as indicated at 'w making the two bricks, w and" w, interchan cable. The

bricks w, w, may be readily titted to furllowevcr, the wedge shaped bricks,

the are designed to fill, and provide them Ill) mic-es varying widely in size, and the projections, w. admit of easy adjustment by chipping then't if need be.

It will be noted that the bulk of the weight of the bricks. w. will rest upon the edges" of the body bricks, f and f*, and to best support them, l arrange the arch tubes. 1'), substantially beneath the joints bet ween them. If preferred, non-fusible material may be placed between the several bricks, in order that the arch or a portion thereof may be readily removed, without breaking any of its parts. To get at the stay bolts, the side or marginal bricks may be readily lifted out of place without disturbing the remainder of the arch, exposing said bolts for inspection or repair. This construction forms an arch which, though formed of bricks of a definite size and shape, may be fitted to furnaces of various widths. and which, when placed in position. will fit the fire box so snugly as to prevent vibration of its componentmembers or of the arch as a whoie. Further. the arch may be readily dismantled to get at the tine sheet or the stay bolts for inspection or repair.

As va ions modifications of my invention will readily suggest themselves to one skilled in the, art. I do not limit my invention to the specific constructions described herein.

Ilaving thus described my invent-ion I claim as new and desire to secure by Letters Patent 1. A locomotive boiler furnace having irregular upwardly and outwardly flared side walls and provided with longitudinally arranged inclined arch tubes, in combination with a refractory front arch resting upon said tubes and comprising a bottom front brick abutting the. rout wall or fine sheet of the furnace, at body portion composed of a longitudinal row of similar bricks, of uniform cross-section throughout, and irregular side bricks adapted to close the spaces hes tween said body portion and said side walls, substantially as described.

2. A locomotive boiler furnace having irregular upwardly and outwardly flared side walls and provided with longitudinally arranged inclined arch tubes, in combination with a refractory front arch resting upon said arch tubes, and comprising a bottom front. brick abutting the front wall or line sheet of the furnace, a body portion ft-irmed of a longitudinal 'row of similar bfieks of less width than the narrowest part of the furnace, and of uniform cross-section throu hout, and irregular side bricks closing t no spaces between said body portion and said side walls, substantially as describcd.

3. A locomotive boiler furnace having irregular upwardly and outwardly flared side walls and )rovided with lon itudinally arranged inc iued arch tubes, Ill combination with a refractory front arch resting upon said arch tubes and comprising a body portion formed of a longitudinal row of similar bricks of uniform cross-section throughout, and irregular side bricks conformed to said side walls and adapted to close the spaces between said body portion and said side walls. said side bricks having lugs or points upon their outer edges to rest against the side walls of the furnace, substantially as described.

4, A locomotive boiler furnace having a group of longitudinal, inclined arch tubes, Ill combination with a refractory arch, comprising a bottom front brick of substantially the width of the. furnace and abutting the front wall or flue sheet of the furnace, a body portion formed of a row of similar bricks longitudinally arranged and substantially the width of the group of arch tubes and resting thereon, side bricks of greater width than the spaces between the body portion of the arch and the, side walls, and adapted to close said spaces, longitudinal air ducts through said body portion, and a transverse air duct in the lowermost brick of said body portion, said transverse air duct being in communication with the outer air through the sides of the furnace, substantially as described.

5. A locomotive boiler furnace having irregular side walls and provided with a group of longitudinal, iiiclined arch tubes, in con'iblnatton with a refractory arch, comprising a bottom end'- brick of substantially the width of the furnace and abutting the flue sheet, a body portion rising from said end brick and formed of a longitudinal row of similar bricks of substantially the width of the group of arch tubes, and resting thereon, irregular side bricks of greater size than the spaces between the liodyportion of the arch and the side walls. and closing said spaces, longitudinal air ducts through said body portion and a transverse air duct in the lowermost brick of said body portion, said transvcrse air duct communicating with the air through the sides of the furnace, sub stant'ially as described.

6. A locomotive boiler furnace having irregular upwardly and outwardly ilared side walls, and provided with longitudinally'arranged inclined arclatubes, in ombination with a refractory arch resting upon said arch tubes. and comprising a body portion formed of a longitiuliual row of similar bricks, of substantially the width of the arch tubes and resting thereon. said body portion having up 'artlly and inwardly inclined dges. side bricks tairres mndingly beveled to [if the edges of said body portion and resting hereon, said side bricks being of greater width than the spaces between the sides of said body portion and the sides ol' the furnace and having outer edges conl'orna-d to said side walls, and adapted to close said spaces, substantiall as described.

7. A. locomotive oiler furnace having irregular upwardly and outwardly flared side walls, and rovided with longitudinally arranged arc tubes, in combination with a refractory front arch, said arch comprising a body portion of less width than the narrowest ortion of said furnace, and havin upwardly and inwardly inclined edges, and irregular side bricks supported upon the edges of said body portion and leaning against the side sheets, said arch tubes being arranged beneath the joints between said bod portion and said bricks, substantially as d escribed.

8. A locomotive boiler furnace provided with longitudinally arranged inclined arch tubes, in combination with a refractory front arch resting upon said tubes, and comprising a central or body portion of less width than said. furnace, and having upwardly and inwardly inclined edges, and side bricks of greater size than the spaces between the edges of said body portion and the sides of the furnace, and adapted to close said spat-cs, said side bricks having doubly beveled edges to rest against and be supported by the in clined edges of said body portion, and lu s upon the outer edges to rest against the si e sheets, substantial] as described.

9. A locomotive oiler furnac having longitudinally arranged inclined arch tubes,

and provided with side air intake tubes, in combination with a front arch comprising a bottom end brick abutting the flue sheet of substantially the width of the furnace, a single longitudinal row of bricks of substantially the same width as the group of arch tubes, and having holes therein which register to form longitudinal ducts through the arch, the lower brick of said row also having a transverse air duct, wedge-shaped bricks fitted between the ends of said lower brick and the side sheets, and having air ducts therethrough connecting said transverse air duct with said air intake tubes, and side bricks of greater width than the spaces between the central row of bricks and the side sheets, and supported thereby to substantially fill said spaces, substantially as described. Y

1.0. A locomotive boiler furnace of the narrow fire box type, containing inclined arch tubes, in combination with a single brick resting upon said tubes and against the flue sheet, channeled bricks forming the body of an arch and supported. by said single brick and said tubes, channeled lateral wedge bricks abutting the lower arch-bodyformin r bricks and communicating with the clninnc s therein, air tubes in the sides of the furnace communicatin with said wedge bricks and other wedge liricks preventing lateral movement of the botly-formingbricks on said tubes, substantially as described.

11. A locomotive boiler furnace of the narrow fire box type, having inclined arch tubes and provided with air tubes in its sides in combination with a refractory arch body resting upon said tubes and containing one or more longitudinal air channels and channeled wedge bricks extcndin between the arch body and the air tubes in the furnace. sides, the channels in said wed e bricks communicating with the longitu inal channels in said body, substantially as described.

lit. A locomotive boiler furnace containa group of longitudinally arranged arch mg tu es 111 combination with a refractory arch' body arranged on said. arch tubes and containing air ducts and wedge shaped bricks arran ed between the sides of the furnace and the arch body and having channels of ducts communicating with the ducts in the arch body and tubes in the side walls of the furnace communicating with the ducts in said wedge bricks, substantially as described. In testimony whereof, I have hereunto set my hand, this 3d day of May, 1907, in the presence of two subscribing witnesses.

CHARLES B. MOORE. 

